/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import accessor.Department;
import accessor.DepartmentAccessor;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Date;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "update_department", urlPatterns = {"/update_department"})
public class update_department extends HttpServlet {
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        DepartmentAccessor accessor = new DepartmentAccessor();
        Department department = new Department();
        int departmentID = Integer.parseInt(request.getParameter("departmentID"));
        String department_name = request.getParameter("department_name")!=null?request.getParameter("department_name"):"";
        String description = request.getParameter("description")!=null?request.getParameter("description"):"";

        try {
            if (request.getParameter("submit") == null) {
                request.getSession().removeAttribute("update_description");
                request.getSession().removeAttribute("update_department_name");
                request.getSession().removeAttribute("updateDepartmentError");
                response.sendRedirect("admin/update_department.jsp?departmentID=" + departmentID);
            } else {
                int errorList = 0;
                if (department_name.equals("")) {
                    request.getSession().setAttribute("update_department_name","<p>You must enter department name!</p>");
                    errorList ++;
                }
                if (description.equals("")) {
                    request.getSession().setAttribute("update_description","<p>You must enter department description!</p>");
                    errorList ++;
                }

                if (errorList ==0) {
                    department.setDepartmentID(departmentID);
                    department.setDepartmentName(department_name);
                    department.setDepartmentDescription(description);

                    int retVal = 0;
                    retVal = accessor.updateDepartment(department);
                    if (retVal == 1) {
                        request.getSession().removeAttribute("updateDepartmentError");
                        request.getSession().removeAttribute("update_description");
                        request.getSession().removeAttribute("update_department_name");
                        request.getSession().setAttribute("mess_department", "Update successful!");
                        response.sendRedirect("admin/list_department.jsp");
                    } else {
                        request.getSession().setAttribute("updateDepartmentError", "Update Fail! Try again!");
                        response.sendRedirect("admin/update_department.jsp?departmentID=" + departmentID);
                    }
                } else {
                    response.sendRedirect("admin/update_department.jsp?departmentID=" + departmentID);
                }
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
